It's a noncancerous bone tumor that doesn't spread to other parts of your body. It forms on top of existing bone tissue, usually in places such as your ankles, feet, toes, ear canals, sinus cavity, ...

A bone spur, also called an exostosis or osteoma, occurs when a bony growth extends beyond a bone’s usual smooth surface. Exostosis can cause chronic pain or irritation, depending on its size and ...

Multiple exostoses is a skeletal abnormality that is caused by genetic factors; this is why it is generally referred to as hereditary multiple exostoses. It is also known as multiple osteochondromas ...